This sounds rather odd and not something that I have heard of. It might be helpful to others if you can share details about your operating system. And to confirm, you are up to date on the latest version of Photoshop.
Thank you for your reply Joseph, here is information about my operating system:
Can you provide one of the presumably layered tif files and the corresponding flattened one?
What are the files’ sizes in comparison and do they support the assumption that the one group contains Layers?
Thank you for showing interest in my problem.
Here is the .TIF file with layers which Photoshop can't open; 8bit, AdobeRGB, 300 dpi = 215 MB
(As mentioned, other applications can open this file without any problem, such as IrfanView and GIMP, but they don't show any layers, which is what I need.)
And here is a copy of the .TIF file which I flattened from the original .TIF file before there was any problem opening it; 8bit, AdobeRGB, 300 dpi = 55 MB
Thank you very much for looking into this, I really appreciate any help I can get.
Sorry, I had overlooked your post.
Thanks for the files but I could not get out any of the individual layers, either.
There is a small section starting with »Customers have suggested these recovery utilities« on this page
but the apps mentioned there seem to refer to psd and psb specifically.
There are other psd-recovery-tools available, but I have no experience with them and don’t know whether they would also be able to process tif.
I have one user who is having this same problem. (the other 4 users have no issues)
Manually doing a File>Save As, saving as TIF (any options) then closing and reopening the TIF results in a cannot read TIF file error.
Its about 50/50 that the TIF will be saved incorrectly due to something in photoshop that we cannot pinpoint.
Windows 10 Pro
Radeon R9 360